Journal
INTERNATIONAL JOURNAL OF OBESITY
Volume 34, Issue 7, Pages 1188-1190Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ijo.2009.278
Keywords
waist circumference; body mass index; ethnicity; children; national sample
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Waist-to-height ratio (WHtR) is purported to offer a simpler index of health risk than body mass index (BMI) in children as it requires no adjustment for age or sex. Little is known regarding the usefulness of WHtR in different ethnic groups. The aim of this study was to compare the WHtR cutpoints associated with BMI definitions of overweight and obesity in a nationally representative sample of New Zealand children. Height, weight and waist circumference were measured in 3006 children (51.5% male) aged 5-14 years (n = 1107 Maori, n = 985 Pacific and n = 924 New Zealand European and Others (NZEO)). A WHtR >0.5 was more common in Pacific (43.4%) and Maori (33.1%) children than in NZEO children (20.8%, P<0.001), with 25.6% of children overall being above this cutoff. Although ethnicity influenced the relationship between BMI and WHtR (P<0.01), differences were clinically insignificant as illustrated by the similarity in WHtR values for a given BMI (WHtR of 0.47 in Maori, 0.46 in Pacific and 0.48 in European boys at the 85th BMI percentile). The present results suggest that having WHtR values 40.5 should be equally useful in evaluating cardiovascular health risks in groups of Maori, Pacific and NZEO children. International Journal of Obesity (2010) 34, 1188-1190; doi: 10.1038/ijo.2009.278; published online 12 January 2010
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